JP3322171B2 - Magnetic polishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic polishing apparatus used for polishing a surface of a long thin material, and more particularly, to a tape used for manufacturing electric razor blades, relay parts, micro switch parts, connector parts and the like. The present invention relates to a magnetic polishing apparatus that can be suitably used for deburring, surface polishing, and the like of a thin metal plate.

[0002]

2. Description of the Related Art Conventionally, a magnetic polishing apparatus as shown in FIG. 5 is disclosed in Japanese Patent Application Laid-Open No. Hei 8-323613. In other words, this magnetic polishing apparatus comprises an iron core 3, 3 having its substantially planar end surface magnetized to form a polishing surface 3a, and an iron core 3, 3 formed by rotating the iron core 3, 3 around an axis orthogonal to the polishing surface 3a, 3a. Iron core driving devices 4 and 4, a feed device 2 for feeding a tape-shaped workpiece 1 close to the polishing surfaces 3a and 3a, and a gap between the surface of the workpiece 1 and the polishing surface 3a. 28, a magnetic material supply device 6 for supplying a powdery magnetic material 5;
And a polishing agent supply device 8 for supplying the polishing slurry 7 to the polishing agent 8. The iron cores 3, 3 are rotatably penetrated through through holes provided on the side surface of the coil 22, and are rotated by connecting the ends of the iron cores 3, 3 and the rotation shafts of the iron core rotation drive motors 26, 26 with a belt. I can do it. The end faces of the iron cores 3, 3 opposite to the polished surfaces 3a, 3a are magnetically connected by a U-shaped magnetic yoke 23. The magnetic material supply device 6 uses the magnetizer 6a to magnetize the work material 1 to adsorb the powdered magnetic material 5, and then the magnetic material 5 adsorbed to the work material 1 has a higher magnetic force. It is performed by being adsorbed on the polishing surface 3a of a strong iron core. Abrasive supply devices 8, 8 are polishing surfaces 3a of iron cores 3, 3.
The abrasive 7 is disposed between the iron cores 3 and 3 through pipes 19 and 19 provided on the rotation axis of the iron cores 3 and 3.
Has been supplied.

[0003] In the magnetic polishing apparatus having the above structure, the method of polishing the workpiece 1 is as follows. A powdery magnetic material 5 is adsorbed on the surfaces of the iron cores 3 and 3 to form a polishing brush. In addition, the iron cores 3 and 3 are rotated by the iron core driving devices 4 and 4 with the abrasive 7 adhered to the surface. Since the magnetic material 5 freely entered the uneven portion on the surface of the workpiece 1 and polished, the detail could be polished.

[0004]

However, the conventional example shown in FIG. 5 has the following problems.

That is, when the magnetic polishing apparatus is continuously operated for a long time, the temperature of the iron core 3 rises to about 80 degrees due to frictional heat of the polishing surface 3a and heat generation of the coil 22,
There is a danger that an operator may accidentally touch the iron core 3 to cause burns, or the copper wire covering portion of the coil 22 may be melted and short-circuited.

Further, the magnetic material 5 or the like enters the gap 71 between the iron core support 16 such as the coil 22 and the iron core 3, and the rotation assisting member 24 such as a bearing and the inner surface of the through space of the coil 22 or the iron core In some cases, the magnetic material 5 bites between the three side surfaces, and the load on the iron core driving device 4 increases, thereby shortening the service life.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object the purpose of
It is an object of the present invention to provide a magnetic polishing apparatus capable of preventing foreign substances such as the magnetic material 5 from being mixed into the gap 71 between the iron and iron core 3 and suppressing heat generation of the iron core 3.

[0008]

In order to achieve the above object, the invention according to claim 1 comprises an iron core 3 having a substantially planar end surface magnetized to form a polished surface 3a; An iron core driving device 4 for rotating the shaft around an axis orthogonal to the polishing surface 3a;
A feeder 2 for feeding the tape-shaped workpiece 1 close to the polishing surface 3a, and a magnetic material for supplying a powdery magnetic material 5 to a gap 28 between the surface of the workpiece 1 and the polishing surface 3a. In a magnetic polishing apparatus comprising a supply device 6 and an abrasive supply device 8 for supplying an abrasive 7 to the gap 28, an iron core support 16 having a through space 70 through which the iron core 3 is provided,
The iron core 3 is rotatably fitted in the through space 70 via the rotation assisting member 24, and a seal member 74 is provided between the openings of the through space 70 and the iron core 3.
A lubricating liquid supply device 73 for supplying a lubricating liquid 72 is provided in a gap 71 between the inner surface of the core 0 and the side surface of the iron core 3.

In such a magnetic polishing apparatus, a powdery magnetic material 5 is supplied by a magnetic material supply device 6, and a magnetic material brush is formed by adsorbing an appropriate amount of the magnetic material on the polished surface of the magnetized iron core 3.
The abrasive 7 is supplied to the gap between the surface of the magnetic material brush and the magnetic material 5 by the abrasive supply device 8. The magnetic material brush and the abrasive 7 rotate along with the rotating iron core 3,
The surface of the moving workpiece 1 is polished in order. This magnetic material brush changes its shape according to the irregularities on the surface of the workpiece 1,
Since the abrasive 7 enters the recess, the abrasive 7 can freely enter the recess of the workpiece 1 and be polished.

Further, the seal members 74 disposed at both openings of the through space 70 allow the gap between the inner surface of the through space 70 of the iron core support 16 and the side surface of the iron core 3 to be fitted into the through space 70. Since the gap 71 is sealed, foreign matter such as the magnetic material 5 is prevented from entering. Further, since the lubricating liquid 72 is supplied to the gap 71 by the lubricating liquid supply device 73, the lubrication with the rotation assisting member 24 in the gap 71 can be performed, and the lubricating liquid 72 cools the iron core 3 from the surface. Therefore, heat generation of the iron core 3 can be suppressed.

According to a second aspect of the present invention, there is provided the magnetic polishing apparatus according to the first aspect, wherein the magnetic polishing apparatus remains in the abrasive supply passage.
A cleaning agent supply device 64 for supplying a cleaning agent 63 for removing the polishing agent 7 to the polishing agent supply path after the polishing is completed is provided.

In such a magnetic polishing apparatus, a portion where the workpiece guide 9 comes into contact with the workpiece 1 on the feeding side and the take-up side (hereinafter referred to as a fulcrum of the workpiece 1)
Since it is in the vicinity of the iron core 3, the distance between the two fulcrums of the workpiece 1 is also reduced, so that the fluctuation of the workpiece 1 is reduced, and the gap 28 between the iron core 3 and the workpiece 1 is maintained constant. it can. Also, an iron core support 1 that rotatably supports the iron core 3.
6 and the weight 11 are arranged at both ends of the rocking plate 12, and the support base 13 rotatably supports the rocking plate 12 to balance the moment like a seesaw. Thus, the swing plate 12 can be easily swung. Since the rocking device 15 does not support the weight of the iron core 3, the rocking plate 12 that has been moment-balanced with a small force can be rocked. Further, after the use of the magnetic polishing apparatus, the cleaning agent 63 is supplied from the cleaning agent supply device 64 to the polishing surface 3a of the iron core 3 through the polishing agent supply channel, and the cleaning agent 63 remains in the polishing agent supply channel. Abrasive 7, magnetic material 5 and abrasive 7 attached to polishing surface 3a of iron core 3
Is washed away. No troublesome cleaning work is required, and the cleaning of the polishing surface 3a and the abrasive supply path can be performed automatically, reliably, and easily.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a magnetic polishing apparatus according to the present invention will be described below with reference to FIGS.

FIG. 1 is a longitudinal sectional view of a main part of the magnetic polishing apparatus shown in FIGS. FIG. 2 is a plan view of the magnetic polishing apparatus with a partial cross section. FIG. 3 is a front view of the magnetic polishing apparatus with a partial cross section. FIG. 4 is a side view of the magnetic polishing apparatus with a partial cross section. 1 to 4, this magnetic polishing apparatus is for performing polishing or deburring on both surfaces of a workpiece 1 by magnetic polishing of the workpiece 1 which is a tape-shaped thin metal plate.

A swing plate 12 is rotatably provided on a base plate 21 supported by a plurality of legs 20 via a support table 13 and is swingable by a swing device 15. The iron core 3 is attached to one end of the rocking plates 12
The iron core supports 16, 16 supporting the support 3, and weights 11, 11 at the other end are disposed at positions horizontally balanced with respect to the supports 13, 13. The iron core support 16 has a through space 70 through which the iron core 3 rotatably penetrates.
have. The iron core 3 is formed in a columnar shape, and the penetration space 7 is formed.
Rotation about the axis is freely performed by the iron core driving device 4 via a rotation assisting member 24 such as a bearing provided between the inner surface of the iron core 3 and the side surface of the iron core 3, and the flat polishing surfaces 3a, 3a are provided.
Are opposed to each other at a predetermined interval. The end of the iron core 3 opposite to the polished surface 3a penetrates the end of the magnetic yoke 23 in a non-contact manner. The magnetic yoke 23 is formed bilaterally symmetrically, and has horizontal pieces 23a, 23 parallel to the horizontal direction from the end of the iron core 3.
3a, the hanging pieces 23b, 23b respectively hanging down from the tips of the horizontal pieces 23a, 23a and penetrating through the yoke through holes 21b provided in the base plate 21, and connecting the hanging pieces 23b, 23b below the base plate 21. And the connecting piece 23c. The connecting piece 23c of the magnetic yoke 23 is connected to the inner space 22 of the coil 22.
a in a non-contact manner. This inner space 22a is iron core 3
Even if the magnetic yoke 23 vibrates due to the swing of the
c is formed in such a size that it does not contact the inner surface of the inner space 22a. Further, the coil 22 includes a magnetic yoke 23
Polished surface 3a through magnetic closed circuit
And is fixed to the lower surface of the base plate 21.

The iron core driving device 4 includes an iron core rotation driving motor 2.
6 and a belt 27 connecting the iron core rotation drive motor 26 and the iron core 3. The rotation of the iron core rotation drive motor 26 causes the iron core 3 to rotate around the axis. Since the iron cores 3 and 3 swing, the iron core driving devices 4 and 4 are fixed on the swing plates 12 and 12 so as to interlock with the iron cores 3 and 3. Also,
The weight 11 is formed in a quadrangular prism shape, and the iron core 3 and the iron core support 1 are formed.
A large specific gravity having substantially the same weight as the combined weight of the iron core drive device 6 and the iron core driving device 4 is preferably used, and in this case, an iron material is used.

A lubricating liquid supply device 7 for supplying a lubricating liquid 72 to a gap 71 between the inner surface of the through space 70 and the side surface of the iron core 3.
3 are provided. Further, seal members 74 are provided between both openings of the through space 70 and the iron core 3 so that the lubricating liquid 72 does not leak outside. The lubricating liquid supply device 73 includes a temperature-adjustable oil cooler having a pump 73a for supplying the lubricating liquid 72, a supply port 73b for the lubricating liquid 72, and a suction port 73c for the circulated lubricating liquid 72. I have. Lubricating liquid supply holes 16a and 16b are provided above and below the outer shell of the iron core support base 16, respectively, and the openings of the two lubricating liquid supply holes 16a and 16b and the supply port 73b and the suction port 73c of the oil cooler are respectively formed. Lubricant tube 7
5 are connected.

In the swinging device 15, an arm 30 suspended from the lower surface of the end of the swing plate 12 on the weight 11 side penetrates the base plate 21 in a non-contact manner. A shaft is provided horizontally at the lower end of the arm 30, and a rotatable cylindrical cam follower 31 is provided on the shaft. An outer peripheral surface of the cam follower 31 is pressed against an outer peripheral surface of a cylindrical cam 32 eccentrically fitted to a shaft of a drive motor (not shown) by a holding spring 33. The holding spring 33 connects the holding member 34 fixed to the lower surface of the base plate 21 and the vicinity of the cam follower 31 in the arm 30, and presses the cam follower 31 against the cam 32. The drive motor is fixed to the holding member 34

The workpiece 1 is passed by the feeding device 2 while holding the polished surfaces 3a, 3a of the iron cores 3, 3 and predetermined gaps 28, 28 in the gap between the iron cores 3, 3. The feed device 2 here is a braking device 2a which is on the feed side of the workpiece 1 and applies braking to the feed by a friction clutch.
And a take-up device 2b on the side where the workpiece 1 is pulled out and pulls the workpiece 1 by the rubber roller 29, and tension is applied to a portion of the workpiece 1 that passes between the iron cores 3 and 3. It has become something. The rubber roller 29 is used to prevent slippage. Further, the tension applied to the workpiece 1 is made variable by making the braking force of the friction clutch in the braking device 2a variable.

At the tip of the iron cores 3, 3 on the polishing surface side, cylindrical workpiece guides 9, 9 are provided so as to cover the periphery of the iron cores 3, 3. The workpiece guide 9 is connected to the iron core 3 and the iron core support 16 via a rotation assisting member 24 such as a bearing.
Is fixed to a workpiece guide support 10 which is rotatably fitted to the outside. The workpiece guide 9 is arranged so that the workpiece side end face and the polishing surface 3a are parallel to each other, and forms a predetermined gap 28. After fixing the workpiece guide 9, the feeder 2 is positioned and fixed. In the vicinity of the iron cores on the feed side and the take-up side of the workpiece 1, the workpiece 1 is sandwiched from both sides by a pair of workpiece guides 9, 9 and slides on its end face. A guide drive motor 18a fixed to the iron core support 16 and a guide drive motor 18
The workpiece guide drive unit 18 is provided, which comprises a guide belt 18b for connecting the workpiece guide support table 10a to the workpiece guide support 10. By rotating the work guide support 10 by rotating the guide drive motor 18a, the work guide 9 supported by the work guide support 10 is rotated. The rotation of the workpiece guide 9 prevents uneven wear due to sliding with the workpiece 1, and the workpiece guide 9
The workpiece side end surface is uniformly worn. The wear amount of the workpiece guide 9, that is, the changing speed of the gap 28 is reduced to extend the life of the workpiece guide 9. Further, the unevenness of the workpiece guide 9 due to uneven wear is prevented, and the workpiece 1 is prevented from wobbling or being caught, thereby preventing the workpiece 1 from breaking or scratching, and maintaining good processing quality. ing. Also, a sealing member 74 is arranged on the polishing surface 3a side of the gap so that the magnetic material 5 attached to the polishing surface 3a does not bite into the gap between the workpiece guide support 10 and the iron core 3. Has been established. Also, the workpiece guide 9
Metals such as aluminum, ceramics and the like are used. In the drawing, the workpiece 1 is indicated by an arrow X.
, And the iron core 3 swings in the direction of the arrow Y.

The magnetic material 5 for magnetic polishing is supplied by a magnetic material supply device 6. The magnetic material supply device 6 is a well-known mono-type pump that has a rotor having a circular section and a stator having a rectangular section, and a substance filled in both spaces is transferred from a suction side to a discharge side. 53
And a stepping motor 5 that can control the number of rotations arbitrarily and with high accuracy as a driving source of the mono pump 53.
4 is used. The rotation shaft of the stepping motor 54 and the rotation shaft of the mono pump 53 are fastened by a coupling joint 52. The magnetic material 5 is moved inside the flexible magnetic material tube 56 by the mono pump 53 and is sent to the magnetic material joint 17. The magnetic material joint 17 is formed in a cylindrical shape, and has one end connected to the magnetic material tube 56 and the other end connected to the aluminum pipe 19 penetrating the iron core 3. The pipe 19 extends through the through hole 14 penetrating from the center of the polished surface 3a of the iron core 3 to the end face of the connecting body 38 which is fitted to the opposite side of the iron core 3 via a rotation assisting member 24 such as a bearing. Penetrating into contact. The magnetic material 5 sent to the magnetic material joint 17 moves through the pipe 19 as a magnetic material supply path and is supplied to the gap 28. This connecting body 38
Is fixed to the yoke by a detent such as an L-shaped plate so as not to rotate.

An abrasive 7 for magnetic polishing is supplied by an abrasive supply device 8 such as a rotary metering pump. The abrasive 7 moves inside the abrasive tube 69 that can be flexibly deformed by the abrasive supply device 8 and is sent to the switching joint 68. The switching joint 68 is formed in a pipe shape having a lateral hole 68 a on a central side surface, and one end is connected to the abrasive tube 69. The abrasive sent to the switching joint 68 moves in the connecting tube 66 which communicates the horizontal hole 68a with the connecting hole 38a penetrating from the upper surface of the connecting body 38 to the through hole 14, and the abrasive is transferred to the inner surface of the through hole 14. It passes through the space between the pipe 19 and the outer peripheral surface as an abrasive supply path and is supplied to the gap 28.
The output of the rotary metering pump is controlled according to the feed speed and the processing state of the workpiece 1. Note that, as the polishing agent, those obtained by adding abrasive particles such as Al ₂ O ₃ , SiC, and diamond to water or a solution obtained by diluting a chemical solution type grinding fluid having a rust-preventing and cleaning action with water are preferably used. Can be

The other end of the switching joint 68 is connected to a flexible and deformable cleaning agent tube 65 connected to a cleaning agent supply device 64. Cleaning agent supply device 64
Is constituted by a rotary metering pump, by which the cleaning agent 63 moves in the cleaning agent tube 65, via the switching joint 68 and the connection tube 66,
After being sent to the abrasive supply path of the iron core 3, it is supplied to the gap 28. The abrasive tube 69 and the cleaning agent tube 65 are provided with switching means 67 for switching between the supply of the abrasive 7 and the supply of the cleaning agent 63, respectively. The switching means 67 is formed of an electromagnetic valve or the like. During magnetic polishing, the electromagnetic valve 67a on the abrasive side is opened and the electromagnetic valve 67b on the cleaning agent is closed, and only the abrasive 7 is fed into the abrasive supply path. Can be During the stop, on the contrary, the electromagnetic valve 67a on the abrasive side is closed and the electromagnetic valve 67b on the cleaning agent side is opened, so that only the abrasive 63 is sent into the abrasive supply path. By the operation of the switching means 67, the polishing agent 7 and the cleaning agent 63 can be
And can be used as needed. Cleaning agent 63
For example, a solution obtained by diluting a chemical solution type grinding fluid or the like with rust prevention and cleaning action, which is used for grinding and the like, with water is preferably used.

Further, a cylindrical duct 41 is provided directly below the polishing surface 3a of the iron core 3, and an abrasive storage tank 46 and a cleaning agent storage tank 47 are placed below the duct 41.
The duct 41 has an upper portion formed in an inverted conical cylindrical shape and a lower portion formed in a cylindrical shape, and the upper end edge 41a covers a discharge port 21a provided in the base plate 21 immediately below the polishing surface 3a of the iron core from below. 21 is fixed to the lower surface. A magnetic material adsorbing device 45 for adsorbing the magnetic material 5 passing through the duct 41; separating means 48 for separately supplying the abrasive 7 and the cleaning agent 63 to the abrasive storage tank 46 and the cleaning agent storage tank 47; The polishing surface 3 of the iron core 3
Each of them can be separated from the mixture of the magnetic material 5, the abrasive 7, and the cleaning agent 63 that falls from a.

The magnetic material adsorbing device 45 is formed of a ring-shaped magnet separator, and is externally fitted to and fixed to the outer peripheral surface below the duct 41. Further, the separating means 48 includes:
Immediately below the lower end of the duct 41, a cylindrical switching pipe 59 having an opening at the center of the side surface thereof, and a switching shaft 60 that swingably fixes the switching pipe 59 with the opening upward.
A spring 61 for holding the switching pipe 59 at an angle between one end of the switching pipe 59 and the lower part of the switching shaft 60, and a cylinder 57 having a telescopic shaft 57a for pushing the switching pipe 59 end downward. ing. Switching pipe 5
The openings at both ends are disposed above the abrasive storage tank 46 and the cleaning agent storage tank 47 which are respectively provided. The switching shaft 60 is fixed to opposing side surfaces of the abrasive storage tank 46 and the cleaning agent storage tank 47. Further, the cylinder 57 is disposed above one end of the switching pipe 59 with the telescopic shaft 57a directed vertically downward, and is fixed to the base plate 21 by a fixing plate 57b.

The abrasive supply device 8 is provided in the abrasive storage tank 46, and the cleaning agent supply device 64 is provided in the cleaning agent storage tank 4.
7. Also, the abrasive tube 69 and the cleaning agent tube 65 are formed long accordingly.
The polishing agent supply device 8 and the cleaning agent supply device 64 correspond to the polishing agent 7 or the cleaning agent 63 stored in each of the storage tanks 46 and 47.
As needed, and is supplied to the polishing surface 3a via an abrasive supply path.

In this magnetic polishing apparatus, the iron cores 3 and 3 are rotated around their axes by the iron core rotation driving motors 26 and 26, and the two cores 3 , 3 are excited so as to have mutually different polarities, that is, to attract each other. On the other hand, the magnetic material supply devices 6 and 6 pass through the pipes 19 and 19 inside the iron cores 3 and 3 as magnetic material supply passages, thereby forming a gap 2.
The magnetic material 5 brought into the polished surfaces 3a, 3a
And a magnetic brush which is pressed by the feeding device 2 while being rotated and pressed against the surface of the workpiece 1 passing through the gap between the iron cores 3 and 3. Then, the pipes 19 with the inner surfaces of the through holes 14 as the abrasive supply paths are provided by the abrasive supply devices 8 and 8.
The abrasive 7 that has entered the gap between the powdery magnetic materials 5 through the space with the outer peripheral surface polishes both the front and back surfaces of the workpiece 1 to remove burrs and the like of the workpiece 1. Since the magnetic material brush made of the powdery magnetic material 5 moves while changing its shape according to the unevenness of the surface of the workpiece 1, the surface polishing and deburring of the workpiece 1 can be performed reliably and uniformly. .

During polishing, the lubricating liquid 72 cooled by the oil cooler passes through the supply port 73b, the lubricating liquid tube 75, and the upper lubricating liquid supply hole 16a to form a gap 71 between the inner surface of the through space 70 and the outer surface of the iron core 3. Supplied to The lubricating liquid 72 lubricates the bearing in the gap 71, the iron core support 16 and the iron core 3, so that the iron core 3 can rotate smoothly and the bearing and the iron core 3 are rotated by the rotation of the iron core 3.
Alternatively, the wear of the iron core support 16 can be reduced, so that the life of the device is improved. Further, since the lubricating liquid 72 cools the iron core 3 from the surface, heat generation of the iron core 3 due to rotation can be suppressed. Further, since the gap 71 is sealed by the sealing members 74 arranged at both openings of the through space 70, the lubricant 71 is prevented from leaking to the outside, and foreign substances such as the magnetic material 5 are prevented from passing through the gap 71. Prevents intrusion. The lubricating liquid 72 in the gap 71 is supplied from the lower lubricating liquid supply hole 16b to the lubricating liquid tube 75, the suction port 73c.
Is returned to the oil cooler. In this way,
Since the lubricating liquid 72 is circulated and used, the lubricating liquid 72 can be used efficiently and the lubricating liquid 72 constantly cooled by the oil cooler can be fed.

Since the cam 32 is eccentrically rotated by the rotation of the drive motor, the cam follower 31 whose side peripheral surface is pressed against the side peripheral surface by the holding spring 33 and the arm 30 having the cam follower 31 at the lower end are vertically moved. The swing plate 12 fixed to the upper end of the arm 30 swings with the vibration of the arm 30. Accordingly, the iron core 3 and the weight 11 provided at both ends of the swing plate 12 swing, and move the surface of the workpiece 1 in mutually different directions in a substantially vertical direction. The swinging iron core 3 changes the direction in which the magnetic material brush on the polishing surface 3a polishes the workpiece 1, so that burrs on the workpiece 1 can be efficiently polished. Further, since the iron core 3 is rocked by the seesaw structure, the load on the drive motor of the rocking device 15 can be reduced,
A drive motor with a low braking torque is sufficient.

During the magnetic polishing, the magnetic material 5 of the mixture of the magnetic material 5 and the abrasive 7 falling from the polishing surface 3a is first attracted to the inner peripheral surface of the duct 41 by the magnet separator. Next, the telescopic shaft 57 a is extended by the cylinder 57, and the switching pipe 59 is inclined with the abrasive storage tank 46 side down against the spring 61. The abrasive 7 enters the switching pipe 59 through the central opening, and enters the abrasive storage tank 4.
6. During the stop, the polished surface 3a of the iron core is used.
Of the mixture of the magnetic material 5 and the cleaning agent 63 that fall more,
First, the magnetic material 5 is separated from the duct 41 by a magnet separator.
Adsorbed on the inner surface. Next, the telescopic shaft 57 is moved by the cylinder 57.
When a is contracted, the switching pipe 59 is inclined with the spring 61 facing downward toward the cleaning agent storage tank 47 side. Cleaning agent 63
Enters the switching pipe 59 through the central opening and is supplied into the cleaning agent storage tank 47.

The used abrasive 7 stored in the abrasive storage tank 46 is sucked up by the abrasive supply device 8 provided in the abrasive storage tank 46 and reused. The used cleaning agent 63 stored in the cleaning agent storage tank 47 is also sucked up by the cleaning agent supply device 64 and reused. Polishing agent 7 and cleaning agent 63 after use
Is economical because it can be automatically reused,
The trouble of disposing of the used abrasive 7 and cleaning agent 63 can be saved.

After the completion of the magnetic polishing, the cleaning agent supply device 64
The cleaning agent 63 supplied to the end face of the iron core 3 through the polishing agent supply path by the polishing agent 7 remains in the polishing agent supply path.
In addition, the magnetic material 5 and the abrasive 7 attached to the polishing surface 3a can be washed away.

The polishing amount is the number of rotations of the iron core 3, the current supplied to the coil 22, the feed speed and tension of the workpiece 1, the gap 28 between the iron core 3 and the workpiece 1, the magnetic material 5 and the abrasive 7 It can be finely adjusted by controlling the supply amount and the like. The processing conditions are appropriately determined according to the required quality such as the workpiece 1 or the required surface roughness, and the following conditions can be used as a guide.

Magnetic material particle diameter: 0.05 to 0.5 mm, abrasive particle size: $ 1000 to $ 10000, iron core-working material distance: 1 to 4 mm, iron core rotation speed: 500 to 2000 rpm,
Magnetic flux density: 0.5 to 1.7 T, feed speed: 50 to 500
mm / min, workpiece tension: 1-10 kgf / cm, magnetic material supply: 0.5-5 g / min, abrasive supply: 50-5
00cc / min

The polished workpiece 1 is supplied to a demagnetizer 39.
After being demagnetized, the magnetic material 5 or the abrasive 7 adhered by being cleaned by a cleaning machine 40 having a cleaning nozzle 40b for discharging a cleaning liquid 40a and a rotating brush 40c.
Etc. are dropped and sent out.

In the magnetic polishing apparatus described above, the iron core 3,
Although the magnetic material supply device 6 and the like are disposed substantially symmetrically with respect to the workpiece 1 and both sides of the workpiece 1 are polished simultaneously, when only one side of the workpiece 1 is polished, These devices need only be disposed on the polished surface side of the workpiece 1.

[0037]

According to the first aspect of the present invention, a magnetic material supplying device supplies a powdery magnetic material, and a magnetic material brush is formed by adsorbing an appropriate amount of the powdered magnetic material on a polished surface of a magnetized iron core. An abrasive is supplied to the surface of the magnetic material brush and a gap between the magnetic materials by an abrasive supply device. The magnetic material brush and the abrasive are rotated by the rotating iron core, and sequentially polish the surface of the moving workpiece. This magnetic material brush changes its shape according to the irregularities on the surface of the workpiece and enters the recess,
The polishing agent can freely enter the recesses of the workpiece to be polished. Therefore, burrs on the surface of the workpiece can be effectively removed, and a workpiece having improved surface polishing quality can be obtained.

Further, a gap between the inner surface of the through space of the iron core support and the side surface of the iron core fitted into the through space is sealed by seal members disposed at both openings of the through space. Therefore, it is possible to prevent foreign matter such as a magnetic material from entering. Further, since the lubricating liquid is supplied to the gap by the lubricating liquid supply device, lubrication with the rotation assisting member in the gap can be performed, and since the lubricating liquid cools the iron core from the surface, the heat generated by the iron core is reduced. Can be suppressed. Therefore, it is possible to prevent a worker from accidentally touching the iron core and getting burned, thereby improving work safety. Further, the life of the coil is improved. In addition, the rotation of the iron core becomes smooth, the addition to the motor is reduced, the running cost can be reduced, and the life of the device itself is improved.

According to the second aspect of the present invention, after the magnetic polishing device is used, the cleaning agent is supplied from the cleaning agent supply device to the polishing surface of the iron core through the polishing agent supply path. The abrasive remaining in the agent supply path, and the magnetic material and the abrasive attached to the polished surface of the iron core are washed away. No troublesome cleaning work is required, and the cleaning of the iron core polishing surface and the abrasive supply path can be performed automatically, reliably, and easily. Therefore, the work efficiency is improved, and the polishing quality and the life of the apparatus itself are improved.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a magnetic polishing apparatus according to the present invention.
It is a longitudinal cross-sectional view of the main part showing only one side based on the workpiece.

FIG. 2 is an overall plan view showing a magnetic polishing apparatus according to an embodiment of the present invention, in which a part is viewed in cross section.

FIG. 3 is an overall front view of a magnetic polishing apparatus according to an embodiment of the present invention, with a partial cross-sectional view.

FIG. 4 is an overall side view showing a magnetic polishing apparatus according to an embodiment of the present invention, with a partial cross-sectional view;

FIG. 5 is an overall plan view showing a conventional magnetic polishing apparatus, a part of which is viewed in cross section.

[Explanation of symbols]

 X Workpiece feed direction Y Iron core rocking direction 1 Workpiece 2 Feeder 2a Braking device 2b Pickup device 3 Iron core 3a Polished surface 4 Iron core drive 5 Magnetic material 6 Magnetic material supply device 6a Magnetizer 6b Magnetic material container 7 Abrasive 8 Abrasive supply device 9 Work guide 10 Work guide support 11 Weight 12 Oscillating plate 13 Support 14 Through hole 15 Oscillator 16 Iron core support 16a Upper lubricant Supply port 16b Lower lubrication liquid supply port 17 Magnetic material joint 18 Workpiece guide drive unit 18a Guide drive motor 18b Guide belt 19 Pipe 20 Leg 21 Base plate 21a Discharge port 21b Yoke through hole 22 Coil 22a Internal space 23 Magnetic yoke 23a Horizontal piece 23b Hanging piece 23c Connecting piece 24 Rotation assisting member 26 Iron core rotation drive motor 27 Belt 28 Top 29 Rubber roller 30 Arm 31 Cam follower 32 Cam 33 Holding spring 34 Holding member 38 Connecting body 38a Communication hole 39 Demagnetizer 40 Cleaning machine 40a Cleaning liquid 40b Cleaning nozzle 40c Rotary brush 41 Duct 41a Top edge 45 Magnetic material adsorption device 46 Abrasive Storage tank 47 Detergent storage tank 48 Separation means 52 Coupling joint 53 Mono type pump 54 Stepping motor 56 Magnetic material tube 57 Cylinder 57a Telescopic shaft 57b Fixed plate 59 Switching pipe 60 Switching shaft 61 Spring 63 Detergent 64 Detergent 65 Cleaning agent tube 66 Connecting tube 67 Switching means 67a Solenoid valve on abrasive side 67b Solenoid valve on cleaning side 68 Switching joint 68a Side hole 69 Abrasive tube 70 Penetrating space 71 Void 72 Lubricating liquid 73 Lubricating liquid supply Device 73a Lubricating liquid pump 73b Supply port 73c Suction port 74 Seal member 75 Lubricating liquid tube

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B24B 31/112 B24B 37/00 B23Q 11/12

Claims (2)

(57) [Claims] 1. An iron core having a substantially planar end surface magnetized to form a polished surface, an iron core driving device for rotating the iron core around an axis perpendicular to the polished surface, and a tape attached to the polished surface. A feeder for feeding a workpiece in close proximity, a magnetic material supply device for supplying a powdery magnetic material to a gap between the surface of the workpiece and the polishing surface, and an abrasive in the gap. In a magnetic polishing apparatus comprising an abrasive supply apparatus for supplying,
A through-hole with the rotation axis as the central axis is provided inside the rotating iron core, a pipe is installed in the through-hole, and a space in the pipe,
Of the space between the outer peripheral surface of the pipe and the inner surface of the through hole,
One has a magnetic material supply path for supplying a magnetic material to the gap, the other has an abrasive supply path for supplying an abrasive to the gap, and has a through space through which the rotating iron core passes.
An iron core support base is provided and provided between the inner surface of this through space.
The iron core is rotatably fitted through the rotation assisting member,
A seal member is provided between both openings of the through space and the iron core, and a lubricating liquid supply device for supplying a lubricating liquid to a gap between the rotation assisting member and the iron core side surface is provided. Characteristic magnetic polishing equipment. 2. A polishing apparatus according to claim 1, further comprising a cleaning agent supply device for supplying a cleaning agent for removing the polishing agent remaining in the polishing agent supply path to the polishing agent supply path after the polishing is completed. The magnetic polishing apparatus according to the above.